Expected output

The link to the Mozilla Parser API is broken in the docs/syntax-tree-format.md file. The link needs to lead you to the old SpiderMonkey Parser spec.

Relevant references

The broken link: https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Parser_API
I think that the link needs to update to the https://web.archive.org/web/20210314002546/https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Parser_API as used in https://github.com/estree/estree/blob/f2534c31c87fecd1475af3efea3b1ef8cfcfb073/README.md?plain=1#L3